IS 723 specifies bright steel bars and rods with precision dimensional tolerances for pattern making, jig/fixture manufacture, and precision mechanical components. These are cold-drawn or ground bars with much tighter tolerances than standard hot-rolled bars.
Specification for bright steel bars and rods with close dimensional tolerances for pattern making, jig and fixture components, and precision mechanical parts.
Key Values
Diameter tolerance (h9, 10-18mm)±0.043 mm
Diameter tolerance (h11, 10-18mm)±0.110 mm
Ovality max50% of tolerance
Practical Notes
! Bright bars (IS 723) are significantly more expensive than black bars (IS 2062) due to cold drawing and grinding.
! Specify h9 tolerance for precision work and h11 for general engineering components.
! Store in dry conditions — bright finish is susceptible to surface rust without protective oil coating.